Apparatus for indirect generation of steam for locomotives



Juiy Z, 1929., 0, H T L'HQOH) APPARATUS FOR immwcw GENERATION OF STEAM FOR LOCOMOTIVES Filed Nov. 22, 1926 2 Sheets-Sheet l have/M01". DTTU H. HAP'IMA/YN July 2, 192%.

O. H. HARTMANN APPARATUS FOR INDIRECT GENERATION OF STEAM FOR LOCOMOTIVES Sheds-Sheet Filed Nov. 22, 1926 O O G O O O Patented July 2, 1929.-

UNITED STATES OTTO H. HAIRTMANN, OF .OASSEL-WILHELMSHOHE, GERMANY, LSSIGNOR TO SCHMIDTSCHE HEISSDAMPF-G. K. B.

MANY, A CORPORATION OF GERMANY.

3., OF CASSEL-WILHELMSHOHE, GER- .APIPAR ATUS FOR INDIRECT GENERATION OF STEAM FOR LOCOMOTIVES.

Application filed November 22, 1926, Serial No.

The invention relates to apparatus for the indirect generation of high-pressure steam for locomotives.

It has already been proposed to generate high-pressure steam of 60 atmospheres 1n the fire-boiz of a two-pressure locomotive, the second boiler being of the usual smoketube type and generating steam at say 14 atmospheres.

It has further been proposed to adapt the fire-box of such an installation to the indirect generation of the high-pressure steam, the water tubes forming the walls and root of the fire-box being for this purpose con- 1 nected with heating coils which lie in the high-pressure drum and there give up the heat which has been received in the part of the heatin system surrounding the combustion cham or proper.

If a structure as described, however, 1s carried out as a single whole, the inclined position of the locomotive on rising or falling gradients causes the waterlevel to take up such a position that parts of the heatlng system in contact with the combustion gases are deprived of water.

With the object of eliminating this disadvantage, the heating system according to the present invention is sub-divided into independent sections lying one behind the other in the longitudinal direction of the locomotive, their dimensions in this direction being such that when the locomotive departs from the horizontal position, the

water level within any one of the individual sections never sinks far enough to deprive of water those parts in contact with the combustion gases.

In order to secure the results aimed at, all

the component parts of the heating system,

i. e., the lower water headers, the lateral intermediate headers or drums arranged above the combustion chamber, as well as the water tubes forming the walls and roof of the combustion chamber and the heating coils arranged in the upper drum, are divided into parts or sections, each forming for itself a closed circulating system. a

Each heat-emitting section of the heating system is connected independently by an inlet pipe with the corresponding intermediate header by way of a distributor header preferably lying within the high-pressure drum; the condensate from any heat-emit- 148,971, and in Germany November 23, 1925.

bly of the individual groups of sections of the heating system. 1

Referring to the accompanying drawings,

in which one constructional form of the invention is shown by way of example Figure 1 shows a side view'of the fire-box of a two-pressure locomotive;

Figure 2 is a cross-section through the fire-box for the most part on the line 1-1 of Figure 1 but as regards the right-hand upper portion on the line II-II of Figure 1;

Figure 3 shows to a larger scale the connection between a distributor header and an inlet tube on the one hand and with one end of the heat-emitting coil on the other hand; finally Figures 4 and 5 show likewise to a larger scale the butting connection between two adjacent sections of the lower water headers.

In the figures, the high-pressure boiler, 1, of a two-pressure locomotive is of the water-tube fire-box type adapted to generate steam for example at 60 atmospheres, while the low-pressure boiler, 2, is fitted with the usual smoke tubes, 3. The walls and roof of the fire-box are formed by water tubes, 4, which open below into water headers and above into intermediate headers or drums in a known manner, the heat taken up in the water tubes, 4, being transferred by heating coils, 5, to the water in the high-pressure drum, 1, in which they are immersed. The tubes, 4, form therefore, the heat-receiving part of the heating system while the heating coils, 5, form the heat-emitting part.

The lower lateral water headers on each side of the fire-box are divided in the longitudinal direction of the locomotive into six sections, 6", 6",; 6, 6, 6, lying one behind the other while similarly the intermediate headers or drums on each side are divided into six sections, 7, 7", 7 7, 7, 7. 105

The water tubes, 4, which form the side. walls of the combustion chamber connect the lower water headers with the upper intermediate headers in such a way that the tubes are led alternately, one to the intermediate header lying on the same side of the combustion chamber and the adjacent tube to the intermediate header or drum lying on the other side, this tube passing on its way below the upper drum, 1. The water tubes, therefore, together with the individual lower water headers and intermediate headers, form six roups or sections on each side.

T e heating coils, 5, on the other hand are subdivided into twelve groups or sections, one-half of these groups being connected to the heat-receiving tubes on one side of the fire-box while the other half of the heating coils is similarly connected on the other side, the connections being made in the following manner For each group of coils, a distributor header, such as 8, and a collector header, such as 8", are provided lying within the high-pressure drum, an inlet pipe, 9, 9", etc. leading to the distributor header from the corresponding intermediate header section, 7 7", etc., of which there are six on each side of the fire-box. Similarly, to the distributor header within the high-pressure drum, 1,

, one end of a group of heating coils, 5, is connected, the other end of this group standing in connection with one ofthe collector headers, 8", which in turn is connected by downcomers, 10, 10", etc., (likewise six on each side) to one of the lower water headers.

The coils or serpentines, 5, of each group pass in parallel from each distributor header, 8, to the corresponding collector header 8b The connection of the distributor header respectively with one of the inlet pipes, 9, and with one end of a group of heating coils, 5, is shown in Figure 3. A threaded branchpiece, 11, on the distributor header, 8, projects through the wall of the high-pressure drum, 1, and is retained in place by a nut, 12, the inlet pipe 9, being connected by flanges, 13 and 14, with the branch-piece, 11; by such means the connection of the inlet pipe, 9, with the distributor header, 9*, can be readily broken.

The end of the heating coil, 5, on the other hand, is connected preferably by welding with a projection on the distributor header, 8, as indicated at '15 in Figure 3.

The connection of a collector header, 8*, with the corresponding outlet pipe, 10, and the other end of the group of heating coils can be made in a similar manner.

The right-hand upper portion of Figure 2 shows how an intermediate header or drum is held by a stirrup, 18, to a bearer, 19, carrled by the frame of the locomotive, the whole'water-tube fire-box in this manner he- 1ng suspended from the bearers, 19, provided for supporting the upper drum, 1.

Figures 4 and 5 show how one of two butting water headers, 6 and 6", is provided with a centralizing spigot, 16, which corresponds with a centralizing recess, 17, in the butting wall of the adjacent chamber. The wall formed by the water tubes, 4, is interrupted at its lowest point where two adjacent water headers butt, as at this point no tube can be inserted. The tube, 1, lying above the butting point of two adjacent header sections is therefore, as seen in Figures l and 4, bent at its lowest point so that it enters the header concerned to one side of the butting joint. The breaches indicated above in the water-tube walls are preferably filled with refractory material, 20.

The intermediate headers, 7, 7", etc. likewise are provided with centralizing spigots and recesses respectively, which may be shaped in a manner similar to that shown in Figures 1, 4 and 5, for the lower water chambers, 6 and 6 The unheated downcomers carrying the condensate of the heat-carrier are indicated at 10 and 10".

In the example shown the sub-division of the heating system has been carried out to 'the extent of six sections or groups but in appropriate circumstances a smaller number of groups may be suflicient.

I claim:

1. A plant for the indirect generation of high pressure steam for locomotives, comprising a boiler drum, a plurallty of longitudinally adjoined heat receiving sections below said drum and surrounding the fire box, each section comprising two lower longitudinal headers, one on each side of the fire box, two longitudinal upper headers, one above each of said lower headers, and connecting tubes between each upper header and the lower headers, an individual heating circuit in connection with one side of each heat-receiving section, and an individual heating circuit in connection with the opposite side of each heat-receiving section, each heating circuit comprising a heat-emitting element disposed within said drum, said element being connected in series with an upper and a lower header of its corresponding heat-receiving section.

2. A plant for the indirect generation of high pressure steam for locomotives, C0111- prising a boiler drum, a plurality of longitudinally adjoined heat-receiving sections below said drum and surrounding the lire box, each section comprising two lower longitudinal headers, one on each side of the fire box, two longitudinal upper headers, one above each of said lower headers, and connecting tubes between each upper header and the lower headers, an individual heating circuit in connection with one side of each heat-receiving section, and an individual heating circuit in connection with the opposite side of each heat-receiving section, each heating circuit comprising a heat-emitting element disposed within said drum, said eleinent consisting of laterally positioned upper and lower headers connected by tubes, a connection between the upper header of the heat-emitting element and an upper header of the heat-receiving section, and a connection between the lower header of the heating element and a lower header of the heat-receiving section.

3. A closed heating system in combination with a Working boiler drum for the indirect generation of high pressure steam for locomotives, said heating system being divided into longitudinally adjoined sections, each forminga closed circulating system and com prising heat-receiving parts consistin of lower water headers, one on each side or the fire box, and upper intermediate headers,

one on each side of the fire box, all of said headers lying in a longitudinal direction and being connected by upright tubes, a heating element in connection with one side of the heat-receiving parts and a similar heating element in connection with the opposite side of the heat-receiving parts, said heating elements comprising sets of superposed pipes, the sets being vertically and transversely disposed adjacent each other Within the water space of the boiler drum, and arranged so that those connected with one side of the system alternate longitudinally of the drum with those of the opposite side of the system.

In testimony whereof I have aflixed my signature.

OTTO H. HARTMANN. 

